5s
The energy sublevel being filled by the elements Ce to Lu is the 4f sublevel. These elements are part of the lanthanide series and have their outermost electrons entering the 4f orbital.
4s. Both K and Ca are s block and they are both in the 4th period. So in K, you have 4s1 and in Ca you have 4s2
In the fifth period of the periodic table, the atoms of the elements in the first two groups are adding 1 and 2 electrons, respectively, to their highest energy 5s sublevel. Starting in group 3/IIIB and going through group 12/IIB, the atoms of those elements are adding electrons to their highest energy 4d sublevel. Since the d sublevel can contain a maxium of 10 electrons, there are 10 elements whose atoms are filling the 4d sublevel. Once the 4d sublevel is filled, the next higher energy sublevel is the 5p sublevel. Starting with the group 13/IIIA elements, the 5p sublevel is being filled. Since a p sublevel can contain a maximum of 6 electrons, there are six elements whose atoms are filling the 5p sublevel. 5s sublevel filling: 2 elements 4d sublevel filling: 10 elements 5p sublevel filling: 6 elements --------------------------------------- Total: 18 elements For a printable periodic table that includes electron configurations, go to the following link: http://www.nist.gov/pml/data/periodic.cfm
Elements in which the d-sublevel is being filled have properties such as variable oxidation states, colored compounds, and the ability to form complex ions due to the arrangement of electrons in the d orbitals. These elements typically exhibit metallic behavior and can form transition metal compounds with unique chemical and physical properties.
The outermost s sublevel of the representative elements is filled first, followed by the p sublevel. This results in the outermost electron configuration being in the s and p sublevels.
The energy sublevel being filled by the elements Ce to Lu is the 4f sublevel. These elements are part of the lanthanide series and have their outermost electrons entering the 4f orbital.
The elements Yttrium (Y) and Cadmium (Cd) fill the 4d energy sublevel.
4s. Both K and Ca are s block and they are both in the 4th period. So in K, you have 4s1 and in Ca you have 4s2
The elements Y (Yttrium) to Cd (Cadmium) are filling the 4d energy sublevel. This range includes the transition metals from Yttrium (atomic number 39) to Cadmium (atomic number 48), where the 4d orbitals are progressively filled with electrons.
In the fifth period of the periodic table, the atoms of the elements in the first two groups are adding 1 and 2 electrons, respectively, to their highest energy 5s sublevel. Starting in group 3/IIIB and going through group 12/IIB, the atoms of those elements are adding electrons to their highest energy 4d sublevel. Since the d sublevel can contain a maxium of 10 electrons, there are 10 elements whose atoms are filling the 4d sublevel. Once the 4d sublevel is filled, the next higher energy sublevel is the 5p sublevel. Starting with the group 13/IIIA elements, the 5p sublevel is being filled. Since a p sublevel can contain a maximum of 6 electrons, there are six elements whose atoms are filling the 5p sublevel. 5s sublevel filling: 2 elements 4d sublevel filling: 10 elements 5p sublevel filling: 6 elements --------------------------------------- Total: 18 elements For a printable periodic table that includes electron configurations, go to the following link: http://www.nist.gov/pml/data/periodic.cfm
Elements in which the d-sublevel is being filled have properties such as variable oxidation states, colored compounds, and the ability to form complex ions due to the arrangement of electrons in the d orbitals. These elements typically exhibit metallic behavior and can form transition metal compounds with unique chemical and physical properties.
The outermost s sublevel of the representative elements is filled first, followed by the p sublevel. This results in the outermost electron configuration being in the s and p sublevels.
Energy-favorable states for the d sublevel occur when it is half-filled or fully-filled with electrons. This is because half-filled and fully-filled d sublevels have lower overall energy due to electron-electron repulsions being minimized. Additionally, these configurations result in greater stability and lower energy.
Because in the first period, only the first energy level is being filled with electrons, which can take only a maximum of 2 electrons in the s sublevel. The electron configuration of hydrogen is 1s1 and helium is 1s2. There is no p sublevel in the first energy level.
The Aufbau principle states that electrons must be added to elements and ions in a VERY specific order with the lowest energy level being filled first and the highest last. This is where the Aufbau triangle comes in. It shows the order in which the energy levels must be filled.
An electron moves from the 4s sublevel to produce a completely filled 3d sublevel. A completely filled sublevel is more stable. Just because it has a filled d sublevel doesn't prevent it from being a transition metal. It has variable valence (1+ and 2+).
D orbitals start to get filled after the 3p orbitals in the periodic table. They are typically filled after filling the 4s orbital, as the 3d orbitals are the next to be filled in the transition metal series.